Smoking pipe



J. E. AYRES SMOKING PIPE Nov. 6, 1951 2 SHEETS-SHEET 1 Filed March 27, 1946 w/Ijl f.

Nov. 6, 1951 L E AYRES 2,573,822

SMOKING PIPE Filed March 27, 1,946 2 SHEETS- SHEET 2 .ZA-l VENTO@ Trae/WSNS4 Patented Nov. 6, l951 UNITED STATES PATENT QFFICE j2 Claims.

1 This .invention relates -to `a .tobacco pipe. A `principal object is to provide a pipe which will `afford a ycool smoke without .departing from the use of conventional and .desirable materials for making the bowl of the pipe. Another object is to provide a pipe that may be readily assembled and disassembled and which thus lends itself to easy and rapid cleaning. Other objects and .advantages will become apparent from the ensuing description.

In the construction of the pipe` according to the invention the bowl is enclosed in an annular sleeve or radiator section which incorporates a circumferentially arranged series of open-ended, vertical smoke passages laterally communicating alternately at upper and lower ends to provide a circuitous smoke path. The end pass-ages of the series, that is, the inlet and outlet passages, register respectively with a rst smoke duct leading to the bottom of the bowl and a second duct leading to the pipe stem.

The outer surface of the bowl, which includes substantially all of the underside area and all of the side area thereof, is in indirect heat eX- change relation with circulating air by virtue of a system of internal air passageways. Air enters the base portion of the pipe below the bowl through bottom-opening air inlets, then passes upwardly and into passageways arranged between the bowl and the base portion and between the L bowl and the annular sleeve, and finally passes out to the atmosphere through a series of lateral air outlets in :a cap piece iitting over the annular sleeve. In its said passage the air makes contact with the underside and side surfaces of the bowl, I

thus cooling the same.

The invention may be better understood by referring to the accompanying drawings in which a preferred construction of the pipe is shown and in which:

Fig. 1 is a central, vertical sectionl of the pipe A' showing the construction of the bowl and the base portion and the manner in which the lpipe is assembled;

Fig. 2 is a plan view of the .base portion;

Fig. 3 is a partly sectioned elevational View formed integrally therewith. The base portion has a central bore 3 which opens upwardly into a yconical cavity or central depression 4 surrounded lby an annular upper face 5 and ledge or step. vBelowithe bore 3, the base I is counterbored, as indicated, by providing the enlarged `cavities 1 and '8. A series of bottom-opening air vinlets 9, arranged around the central bore 3, extendthrongh the base portion and open into the conical cavity or depression 4.

.A removable bowl ID., having a conicallyshaped .bottom and an oyerhanging or flanged top, is centered with respect to the bore 3 of the base portion by means of an insert .I2 .seated in the bottom of the bowl and projecting below it. The outer surface of the bottom of the bowl is .spaced from the surface of cavity 4 to forman annular passageway II into which open the upper ends of air inlets 9. The downwardly projecting sleeve portion vlll of insert I2 is internally threaded to receive the externally threaded portion of a hol- 10W screw I6 having an enlarged head I'I which Seats in the counterbore 8. The head I5 of insert l2 Yhas a central opening 2'2 which affords access to the interior of screw IB. The wall of the latter is provided with side openings 23 which connect the interior of screw .I6 with the counterbore section 1.

The ibase portion I incorporates a pair of smoke passages, one of which has an entrance .20 (Fig. `2) vin the annular face 5 and a lateral stem exit 2l.. The other smoke passage comprises one or more ducts (two in this instance, marked '24 and -25 .in Fig. 2) opening `into `counterbore 1 through the. duct openings 255 and .21, and having their exits 28 and 29 .in the vannular face 5.

The bowl lll is surrounded and -enclosed by an annular .sleeve or radiator section 30, which seats upon the .annular face 5 and step 6. The sleeve is formed .of an outer and an inner wall, 3l and 32, respectively, and the space between these walls is .divided by baiiles .33 into a circumferentially ,arranged series of open-ended, vertical smoke passages 34, which communicate laterally at alternate upper and lower .ends to provide .a circuitoussmoke path. The end passages of the series register, respectively, with the `smoke passage entrance 2'0 and the smoke passage exits 28,. 29. -Thus, in 4, the smoke passages 34a and 34D., into which smoke is .drawn from the bowl, register with .the .smoke passage exits '28 and 2B lin the .annular face g5; while the smoke passage .34s, through which smoke leaves the ,annularsleeve, registers with vthe .smoke vpassage entrance 20 in theface. .The radiator section incorporates a solid portion 35 which separates the smoke inlet passage 34a from the smoke outleijl passage 34e. The portion 35 carries a downwardly projecting locating pin 36 (Figs. 3 and 5), which is adapted to fit a locating hole 31 in the base portion (Fig. 2) to aid in properly assembling the sleeve upon the base portion. The outer wall 3| of the sleeve carries a series of cooling fins 38.

An annular cap 40 seats on both walls of the sleeve 30 (Fig. 1) and is adapted to close the upper open ends of the smoke passages 34. As shown, the cap underlies and is in engagement with the flanged top of the bowl. The inner Wall 32 of the sleeve is slightly longer than the outer wall at both top and bottom; it is thus adapted to engage, at the bottom, the step or ledge 6 to seal the lower open ends of the smoke passages 34, and at its top the wall 32 engages the recess 42 in the cap 40. The upper surface of cap 49 is provided with a series of radial grooves 4I which serve as air outlets.

As seen in Fig. 1, the sleeve 30 is separated from the bowl by an annular space or passageway 39, which at its lower end is in communication with the passageway Il and at its upper end with the lateral air outlets 4I in the cap 40. By this arrangement air may enter through the inlets 9 in the base portion of the pipe, circulate through the passageways Il and 39 in indirect heat exchange relation With substantially all of the underside area of the bowl and all of the side area thereof, and pass out to the atmosphere through the outlets 4I, As will be recognized, the arrangement insures an eicient chimney effect.

In assembling the pipe the sleeve is first seated upon the base portion and the cap placed on the sleeve. Then the bowl is placed within the sleeve and cap and secured to the base portion by means of the insert screw. A coin may be used to tighten the screw; or the latter may be held and the bowl rotated by its flange to tighten or loosen the assembly. It will be apparent that as the bowl is drawn tighter to the base portion, the sleeve and cap will be coincidently clamped therebetween, the bowl flange also limiting the inward movement of the bowl and thereby serving to insure the proper spacing of the bottom of the bowl from the base.

It will be apparent that the new pipe has several advantages, among which is a low production cost since a number of the parts can be cast from light weight metals. The pipe provides a favorably cool smoke due not only to the fact that substantially the entire bowl is in contact with circulating air, but also to the fact that the smoke in the radiator section is exposed to indirect heat exchange on both sides of the section. It is also apparent that saliva cannot reach the bowl, nor can solid particles from the bowl pass into the stem or the mouth, and the mode of assembly is such that the pipe can readily be taken apart for the purpose of cleaning the desired components.

In the light of the foregoing description, the following is claimed: f

1. A smoking pipe comprising the combination of a base portion having a central depression and an annular upper face surrounding the same and incorporating a rst smoke passage having an entrance in said annular face and a lateral stem exit, said base portion also incorporating a second smoke passage having an entrance in said depression and an exit in said annular face adjacent the rst smoke passage entrance, said base portion also incorporating a series of bottom-opening air passages; an annular radiator section adapted to seat on said face and incorporating a circumferentially arranged series of open-ended, vertical smoke passages laterally communicating alternately at upper and lower ends to provide a circuitous smoke path, end passages of the series registering, respectively, with the first smoke passage entrance and the second smoke passage exit; an annular cap adapted to seat on the radiator section and close the upper open ends of the smoke passages therein; a bowl within the radiator section having a flange adapted to overlie the cap, said bowl having a bottom smoke outlet in communication with said central depression and means for securing the bowl to the base portion to clamp the cap and radiator section in position, said bowl being dimensioned to leave between its own outer surface and the inner surface of the radiator section an annular air passage communicating with said bottom-opening air passages, and said cap incorporating lateral air outlets from said annular air passage to the atmosphere.

2. A smoking pipe composed of a base portion having a cavity therein, an annular ledge surrounding said cavity, and a stem exit, said base portion having air inlets which extend therethrough and open into said cavity; said base portion also having smoke ducts therein, one of which extends from said cavity to said annular ledge and a second of which extends from the ledge to said stem exit; a removable bowl supported in said cavity so as to provide a pasageway between the underside of said bowl and the base portion, said bowl being in communication with said cavity; a sleeve surrounding the bowl and supported on the annular ledge of said base portion, said sleeve incorporating a circumferentially arranged series of open-ended, vertical smoke passages laterally communicating alternately at upper and lower ends to provide a circuitous smoke path, end passages of the series registering, respectively, With said first and second smoke ducts; said sleeve being separated from the bowl by an annular passageway having air outlets in the upper portion thereof, said annular pasageway being in communication at the lower end thereof with said first-mentioned passageway and at the upper end thereof with said air outlets, whereby air may circulate through said pasageways in indirect heat exchange relation with substantially all of the underside area of said bowl and all of the side area thereof.

' JOHN E. AYRES.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,108,604 Moehlenbrock Aug. 25, 1914 1,747,076 Hunter Feb. 11, 1930 2,269,541 MacDonald Jan. 13, 1942 2,325,412 Martin July 27, 1943 FOREIGN PATENTS Number Country Date 369,921 Germany Feb. 24, 1923 13,218 Great Britain of 1885 389,471 Great Britain Mar. 13, 1933 417,561 Great Britain Oct. 8, 1934 628,159 France June 21, 1927 

